Washington Asphalt Pavement Association
Washington Asphalt Pavement Association @AsphaltWA Nonprofit organization Learn more asphaltwa More Home About Events Photos About See all WAPA allows it's members to
Aggregate
Aggregate. Aggregate is a collective term for sand, gravel and crushed stone mineral materials in their natural or processed state NSSGA 1991 . In 2009, the U.S. produced nearly 2 billion tons of aggregate at a value of about $17.2